A selection of Tig Welders ideal for hobby welding. There are two main types of Tig Welder, DC output and AC/DC Output. A Tig welder with DC output will weld most metals with the exception of aluminium. Tig welders with AC/DC output have the ability to weld aluminium and its alloys, including magnesium. All of the following Tig welders are inverter based so are lightweight for maximum portability and produce quality welds.